Mecca and Medina are two common names many people come across when Muslims are preparing for Hajj, an annual Islamic pilgrimage to Mecca, Saudi Arabia, the holiest city for Muslims. Dhu al-Hijjah is ...

GABRIEL UNGER is a postdoctoral fellow at the Stanford Digital Economy Lab. Opinions expressed in articles and other materials are those of the authors; they do not necessarily reflect IMF policy.